Dream IXD
Ways of extracting data from the mind and body

I have been spending some time figuring out which technologies and techniques are being employed in medical research and other fields were monitoring of brain activity is applied, like neuromarketing.

Some methods which are relevant to determining the users cognitive, affective and emotive responses are measurement of:

Electrical activity:

  • Brain-> EEG: Measurement of brain activity; electrical activity along the scalp by detecting voltage fluctuations resulting from ionic current flows within the neurons of the brain.
  • Heart-> ECG:Measurement of the heart rhythm; the electrical activity of the heart over a period of time, as detected by electrodes attached to the outer surface of the skin
  • Eyes-> EOG: Measurement of eye movements by monitoring the resting potential of the retina.
  • Muscles-> EMGMeasurement of muscle contraction: the electrical potential generated by muscle cells when these cells are electrically or neurologically activated.

These methods are jointly used in a process called Polysomnography: recording of the biophysiological changes that occur during sleep.

Blood flow

  • MRA:  A group of techniques based on Magnetic Resonance Imaging (MRI) to image blood vessels. 


  • Actigraphy: a non-invasive method of monitoring human rest/activity cycles which measures the users movement or activity using an accelerometer.

Magnetic Resonance

  • MRIa medical imaging technique using magnetism and radio frequency fields to visualize internal body structures. 

Lung activity and size:

  • Spirometry: Measurement of the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled.
  • Plethysmography: Measurement of changes in the volume of organs, like the lungs.

Body temperature

Sound levels

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